<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>2-8</title>
		<style>
			.div1,.div4{
				background:gainsboro;
				height:50px;
				}
			.div1 a{
				float:right;
				margin:10px;
			}
			.div2{
				float:left;
				width:70%;
				background:lightblue;
				height:200px;
			}
			.div3{
				background: pink;
				height:200px;
			}
			.div4{
				clear:both;
			}
		</style>
	</head>
	<body>
		<div class="div1">信息技术工程学院<a href="#">登陆</a><a href="#">课程查看</a></div>
		<div class="div2">内容</div>
		<div class="div3">侧边栏</div>
		<div class="div4">copyright...</div>
	</body>
</html>
